.7x+.9x=40

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Solution for .7x+.9x=40 equation: 



.7x+.9x=40

We move all terms to the left:

.7x+.9x-(40)=0

We add all the numbers together, and all the variables

1.6x-40=0

We move all terms containing x to the left, all other terms to the right

1.6x=40

x=40/1.6

x=25

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